Self-locking window lock



y 5, 1954 E. TASSELL 2,679,416

SELF-LOCKING WINDOW Locx' Filed Sept. 25, 1950 LEsuE E. TAsssu.

A-r-ronnzvs Patented May 25, 1954 UNITED STATES PATENT OFFICE 2,679,416SELF-LOCKING WINDOW LOCK Leslie E. Tassel], Grand Rapids, Mich.Application September 25, 1950, Serial N 0. 186,628 3 Claims. (Cl. 292242) l 2 This invention relates to an automatic, self- On the upper sideof the upper rail 6 of the locking window lock which is used withwindows lower sash the lock is mounted. It includes a having slidingsashes, and in which, when the sheet metal base 1 having a top anddownwardly sashes are moved to closed position, the lock will extendingsides and ends. Over the top of the automatically move into operativelocking posibase 1, the movable locking member to engage tion and notrequire manual turning of the lockwith the keeper which has beendescribed is ing member to engage with a keeper therefor, pivotallymounted to turn about a vertical axis. but will self engage therewith,providing assur- It is made from sheet metal having a flat genance thatwhen the window is closed the sashes erally circular base 8, from whicha curved verwill be locked together, 10 tical side or wall 9 extendsupwardly around It is an object and purpose of the presentinapproximately one-half of the circumference of vention to provide suchautomatic or self-lockthe base 8. At one end and away from the keepering window lock in a very practical and simple such side 9 is extendedoutwardly in a handle l0 structure, which is sure and simple in itsoperaf r m nual engagement. At the other end the tion and which may beinstalled on the sashes side or wall 9 is formed nto a terminal lip Hand in th same manner a non-automatic l ok located so that when forexample, the lower sash which, after a window i clos d, a t b manuhasbeen lifted and is being moved down to closed ally moved to lockinposition t ins th t th position such edge will ride against acooperating sashes are securely locked and held against edge of the edge4 5) o er by swing the movement. locking member in a counter-clockwisedirection An understanding of the invention may be had about its pivotalmount on the base I (which will from the following description, taken inconherea ter be described), moving lip H back of nection with theaccompanying drawing, in h d of the ledge 4 So h i m y b r which, ceivedand moved underneath to engage with the Fig, 1 i a plan vie of t 1 k andkeeper keeper and lock the two sashes against vertical of my inventionShown together in locked 130 iseparating movement of either of suchsashes. tion. The base 8 is cut away opposite handle 10, as

Fig. 2: is a horizontal sectioh through the base shown n e- 1, f r adistance mak n a r ss, of the lock, substantially on the plane of lineso s that th as w n p p y lo ated with ref- 2-2 of Fig, 3, lookingdownwardly, erence to the lip H may move upwardly relative Fig. 3 is aside elevation of the lock shown in t0 the keeper, the proj c p 5 and pO Fig. 1, the sash rails to which the lock and keeper the ledge 4passing ugh Such recess. The

are secured being in vertical section. ledge 4 is at One end portion oft e re e s or Fig. 4 is a rear elevation vertical section at pa Ou f omhe b s 8- A h o r e d 1 0 right angles to the section hown in Fi 3, takn tion of the said recess a short wall I 3 of arc shape substantially onthe plane of line l 4 f Fi 3, form, similar to but shorter than the wall9, exlooking in the direction indicated, and tends upwardly having itsupp r edge of a curved Fig. 5 is a rear elevation of the lock and keeperam form as shown a I th ed I 4 and the cam the same as in Fig. 4, butwith the lock and edge I 2 of the two wall sections 9 and It beingkeeper separated, the two being shown in locked SubstantiallyParallelposition in Fig. 4. The base 8 has a centrally located headedpivot Like reference characters refer to like parts in IE extendingtherethrough which is of out-ofthe different figures of the drawing.round form where it passes through the base.

On the lower rail 1 of the upper sash of a Such pivot pin extendsdownwardly into the base vertically sliding window, the lock keeper isper- 1 and carries, at its lower end, a head 16 which manently secured.It includes a sheet metal base has two opposed flat sides. A leaf springhaving 2 from the upper side of which a keeper hook exa middle section Il bears one against each of the tends, having a generally verticalportion 3 at fiat sides [6 (Fig. 2), while the end portions I 8 theupper end of which a ledge 4 is bent substanof such leaf springs are ofcurved form to corretially at right angles and which terminates in aspond to the rounded end portions of the downwardly extending lip 5. Theledge t is inhousing 7.

clined at a slightly acute angle to the horizontal The leaf springs whenfree to operate hold the plane of the upper side of the sash rail l onwhich head It in central position, as in Fig. 2, with the the keeper ismounted. movable lock member in its central, normally locking positionas in Fig. 1, and as shown in dashed lines in Fig. 2. When the lock ismanually operated by swinging the handle I!) to the left to release itfrom the keeper, both of the springs I! are stressed so that uponrelease of the handle 10 the locking member returns to its initialposition. On manually turning the locking member or lever to releasefrom the keeper the sashes may be moved either by lifting the lowersash, this being most commonly done, or lowering the upper sash, or bothsashes may be vertically moved, the lower sash upwardly and the uppersash downwardly.

If the upper sash has been lowered, or if the lower sash has beenraised, on moving them to bring the sash rails i and 6 together, as inFig. 3, the lock is turned counterclockwise from the position shown inFig. l by the engagement of an end edge of the ledge 1 against the camedge 12 of the wall 9, thereby turning stressing the springs ll untilthe point or nose of the lip H passes to a position underneath the ledge4. The springs thereupon automatically swing the lever in the oppositeor clockwise direction and the lip ll passes underneath the ledge 4 sothat the two sash members I and 8 are automatically locked againstseparation. It will be noted that the upper edge of the wall a ridesagainst the lower side of the ledge 4.

After the lock described, the projecting handle l0 may be manuallyengaged to turn the movable locking member still further in a clockwisedirection. But irrespective of whether the lock is as tightly locked asmay be desired through the selfdocking or automatic action described,and whether or not subsequently the locking member is manually operatedto make a tighter connection of the movable member with the keeper, thelock is automatic in its operation and the keeper engagement is amplysufficient to insure that the sashes are locked together and cannotseparate by a vertical movement of one relative to another until thelocking member is moved to released position.

If on turning the pivotally mounted locking member counter-clockwisefrom the position shown in Fig. 1 to the dash line position of thehandle it at the right sufficiently that the intermediate stressedportions of the spring I! bear upon the rounded end portions of the headI6, so that the head will not return under the pressure of the springsto its initial position shown in Fig. 2, such extreme of movement willbring the cam edge M of the wall section l3 underneath the opposite edgeportion of the ledge Thereupon on separating the sashes, upon relativevertical movement of one with respect to the other, the curved or camedge !4 will ride against such opposite edge A and turn the lockingmember so that springs l'i will operate to complete the turning of thepivotally mounted locking member to central position as shown, in whichposition the lip l l and its cam edge 12 will be located so as to engagewith the first mentioned edge of the ledge 4.

The window sash lock shown and described is of a very practical, noveland useful structure. It is economically produced and insures thecomplete locking of vertical sliding window sashes so that the twoadjacent rails, the lower rail of the upper sash, and the upper rail ofthe lower sash shall the head It and has automatically operated aswardly extending be locked together, irrespective of whether or not theone closing the window thereafter manually moves the movable lock memberto a tighter looking position.

The invention is defined in the appended claims and is to be consideredcomprehensive of all forms of structure coming within their scope.

I claim:

1. In a structure as described having, a keeper adapted to bepermanently secured at the upper side of a horizontal rail of avertically sliding window sash, a locking member mounted to turn about avertical axis adapted to be permanently secured to a horizontal rail ofa second window sash, said two sashes being vertically slidable pasteach other, and said keeper having a hook portion extending a distanceabove the sash on which it is adapted to be secured, said locking memberincluding a base of generally circular form and an upwardly extendingmember in tegral with the base at an edge thereof, the improvementcomprising said member having at one end a terminating lip having anunder cam edge above the base, said lip being adapted to pass underneaththe hook portion of the keeper for locking the sashes together, yieldingmeans associated with said locking member for normally holding it in theposition it occupies when operatively connected with the keeper, saidmeans yielding when, upon relative vertical movements of the sashes, therails on which the keeper and locking member are adapted to be securedare brought into close proximity and the keeper and locking member havemoving contact engagement, said cam edge riding against one side of thehook until it passes thereby, and thereafter being turned by the forceof said yielding means into locking engagement with the keeper hook.

2. In a window latch including, a keeper, a movable locking memberadapted to turn about a vertical axis, a base on which said lockingmember is mounted for turning movement, said locking member comprising agenerally circular plate immediately over said base and an upverticalwall partly around said plate, one end of said wall terminating in alip, the improvement comprising said lip at its underside being curvedupwardly and outwardly from the lower edge of the wall to the free endof said lip, and yielding spring means operetively connected with saidlocking member for normally holding it in a predetermined position,which is substantially the position which the locking member is to havewhen in looking engagement with the keeper.

3. A structure as defined in claim 2, and a second vertical wall orshort length extending upward from said plate spaced a distance fromsaid lip, said second upwardly extending wall having an upper edge ofcurved form extending downwardly from the upper end thereof toward saidlip, said curved edge of said second upwardly ex tending wall and thelower curved edge of said lip being in generally parallel relation toand spaced from each other.

References Cited in the file Of this patent UNITED STATES PATENTS

